2019-08-23 · How to get a key in a JavaScript object by its value ? Last Updated : 23 Aug, 2019 Method 1: Checking all the object properties to find the value: The values of the object can be found by iterating through its properties.
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Iterate through Object keys and manipulate the key values in JavaScript; From JSON object to an array in JavaScript; Extract unique values JavaScript objects are included in all aspects of the language, so you need to learn them as soon as you start to study it. Objects are created with figure brackets {…} and should have a list of properties. Property is known as a “key: value”, in which key or property name is a string and value can be whatever. Photo by Annie Spratt on Unsplash It's very common that in development we needed only a few key-value pairs from an object and still, we use the whole object or we create a new one with copy-pasting key-values from one to another. Everything is an object in JavaScript. Objects in JavaScript can be declared using figure brackets {..} and the objects may comprise certain properties.
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Prior to ES6, when you need to map keys to values, you often use an object, because an object allows you to map a key to a value of any type. However, using an object as a map has some side effects: In JavaScript, objects penetrate almost every aspect of the language. So we must understand them first before going in-depth anywhere else. An object can be created with figure brackets {…} with an optional list of properties.
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